A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 2 years ago

A train travels between two stations 1/2 mile apart in a minimum time of 41 sec. If the train accelerates and decelerates at 8 ft/sec^2, starting from the first station and coming to a stop at the second station, what is its maximum speed in mph? How long does it travel at this top speed?

  • This Question is Closed
  1. anonymous
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    help pls

  2. ParthKohli
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Let's say that the train takes \(t_0\) time to reach the max. speed \(v_o\). Use the equation \(v_f = v_i + at\). Then you have,\[v_0 = 8t_0\]\[0 = v_0 - 8(41 - t_0)\]

  3. ParthKohli
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Two equations... two variables. Solve.

  4. ParthKohli
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    That is, if I understood your question correctly. The train starts, accelerates at 8 ft/sec^2, reaches the top speed, and decelerates at 8 ft/sec^2?

  5. ParthKohli
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    If that is so, then the other info is useless.

  6. anonymous
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the final answer should be 60mph. but i did't get the same answer ung your two equations

  7. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.